I think Facebook just gave approximately 80% of their entire user base to TikTok, for free.
https://www.facebook.com/legal/music_guidelines
“You may not use videos on our Products to create a music listening experience
We want you to be able to enjoy videos posted by family and friends. However, if you use videos on our Products to create a music listening experience for yourself or for others, your videos will be blocked and your page, profile or group may be deleted. This includes Live.”